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標題: | 雙性聚電解質的擴散泳行為:多離子與非均一截面積孔道的效應 Diffusiophoresis of a Charged-regulated, Zwitterionic Polyelectrolyte: Influence of Multiple Ionic Species and Nonuniform Channel Cross Section |
作者: | Chun-Yuan Su 蘇俊原 |
指導教授: | 徐治平 |
關鍵字: | 擴散泳,聚電解質,電荷可調節,多離子溶液,非均一截面積孔道, Diffusiophoresis,Polyelectrolyte,pH-regulated,multiple ion,Nonuniform nanopore, |
出版年 : | 2015 |
學位: | 碩士 |
摘要: | 本論文考慮了電荷可調節之雙性聚電解質在多離子溶液以及非均一截面積孔道中之擴散泳行為。由於近年來擴散泳在生物、醫學等方面被廣泛應用,雙性聚電解質的計算模擬可以應用在DNA、蛋白質、人造高分子粒子等,本文的研究可以更貼近實際情形。本文的第一個主題中,吾人考慮一個電荷可調節的聚電解質在多離子溶液中之擴散泳行為,探討了不同電解質濃度、pH值以及聚電解值內之官能基多寡對於該行為的影響,證明了H+及OH離子的移動會減弱擴散場造成的誘發電場,影響了聚電解質的移動速率。在第二個主題中,吾人進一步探討在非均一截面積孔道中電荷可調節的聚電解質之擴散泳行為,探討了不同pH值、孔道寬窄以及聚電解質在孔道中不同位置對於此行為的影響,發現聚電解質的速率可以借由孔道寬窄、帶電以及位置的不同來控制。吾人所獲結果,可提供DNA偵測、蛋白質分析等擴散泳裝置設計上具參考價值的資訊。 In this thesis, the diffusiophoretic behaviors of a charge-regulated polyelectrolyte (PE) is modeled theoretically. The charged conditions of a particle depend upon the solution properties such as pH and ionic concentration, and the solution contains multiple ionic species, so that the model considered is closer to reality than previous studies. Two typical problems are considered. In the first problem, we consider the diffusiophoresis of a charge-regulated PE in a solution containing multiple ionic species. The influences of the ionic concentration, the solution pH, and the density of the dissociable functional groups of the PE on its diffusiophoretic behavior are examined. We show that the presence of H+ and OH reduces the induced electric field arising from the diffusiophoresis of the PE, thereby affecting its mobility. In the second problem, we consider the diffusiophoresis of a charge-regulated PE in a charged channel having nonuniform cross section. The solution pH, channel width, and the PE position in the channel are examined for their influences on the diffsiophoretic behavior of the PE. We show that the PE mobility can be adjusted by these factors, thereby providing valuable and necessary information for designing devices, for example, for DNA sensing and protein analysis. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/54512 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
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